Chains and heterogens:
PDB Chain Sequences:
>4pudA (A:) kphisalnapqldqrykneftigaavepyqlqnekdvqmlkrhfnsivaenvmkpisiqp eegkfnfeqadrivkfakangmdirfhtlvwhsqvpqwffldkegkpmvnetdpvkreqn kqlllkrlethiktiverykddikywdvvnqvvgddgklrnspwyqiagidyikvafqaa rkyggdniklymndyntevepkrtalynlvkqlkeegvpidgighqshiqigwpseaeie ktinmfaalgldnqiteldvsmygwpprayptydaipkqkfldqaarydrlfklyeklsd kisnvtfwgiadnhtwldsradvyydangnvvvdpnapyakvekgkgkdapfvfgpdykv kpaywaiidhk